Clamp.



J. H. GIBSON.

CLAMP. APPLIOATIOE FILED MAR. 19, 1910 Patented Apr. 11, 1911.

CLAMP.

connection filed march 1'5, 1910. serial Ito. 5563M.

Bruin, in thecount-y of Butler and State of Pennsylvania, have invented a new and useful Clamp, of which the following is a speci iicetion.

This invention relates to clamps employed for pulling up well casings or tubing, and for pulling, drawing. or suspending rods and other cylindrical objects.

It is the purpose of the invention to provide in e clamp of this kind, improved means for locking the jaws on the object, whereby the letter will be sccurely hcld, and without danger of slipping out of the jaws.

Another aim of the invention'is to provide the clamp with improved rein links danger of being placed easily swung into shposition to the hauling line, without in such a position as which may be for attachment to be wrenched oil when the object is being elevated or suspended.

The invention also has for its aim to provide a hinge connection between the jaws which permits the jaws to be swung open only clamp to be an lied to the object.

Gther object and advantages of the invention will be manifest from the detailed description appearing hereinafter, and in order that the invention may be fully "on dcrstood, reference is had to the eccomponying diiewing, in which Figure l is o side elevation of theclarnp iii-closed position. Fig. 2 is a. plan view. ig. 3 is e plan View of theclsinp in open position, l is a section-oi detail of the h nge joint between the jaws. Fig 5 is a on on. the line 5--5 of Fig. 2.

ring more particularly to the drawnd 6' denote res iectively, the two etnp. These jaws are formed is ends with hinge knuckles '4" ch c-pintle 8 passes, whereby 'tion h e o "awe is had.

en the j end th knuckle. is located he "QtiClClt-ZS of ew Between ides is e'cross'ber the necessary distance to allow the W e is formed with 2i each jaw has a semicircnlar shape as cated at 11, and these ports 11, when the jaws come together to closed position, form a cylindrical opening in which the tubefor other ob'ect to be pulled up or suspended is received.

Beyond the semi-circular portions 11, the jaws are straight, and their are fiat, and come together when are closed. In the upper edge straight portions of the jaws are made recesscs forming 'at one end a. shoulder 12. These recesses are also continued for a short distance into the semi-circular, port-ion of the jaws to form shonlders13 thereon, said shoulders extending-radially with respect to the circular space formed by the semi-cin. cule r portions of closed. The shoulder 12 from the perpendicular, a groove 14, the shoulder and the groove 62' tending trensv ersel of the jaws.

The jews are ,loc ted in closed position by e latch which is carried by a block 15 shaped to fit snugly in the recess formed in the top edge of the jaws. The block is beveled oil at the corners of its forward end to engage the bevcjls, endsaid end, between the shoulders 13, is curved as indicated at 16, to conform to the curvature of the semi-circular portion of the jaws, in order that the continuity of the cylindrical space may not be interrupted.

The block 15 carries a hitch at its said latch comprising a bar 17 extending transversely through c secess in the block, from which it is projected, by a spring 18. This latch bar is carried by a portion of the block which engages the shoulder 12, and the latch her 17 is adaptcdto enterthe groove 14. In this position of the latch bar, the block is securely locked in the recess. The projecting'end of the latch bar is beveled so that .it will be automatically retracted as it slips" down the shouldeig and upon coming opposite the groove, the spring advances the latch bar into' the groove. The latch her prti ects fromopposite ends of the block, and said projecting ends are fitted with finger buttons 19 to facilitate the with drewel of the latch her.

the jaws is slightly inclined parallel arms 20 between which the straight portions of the jaws are received. These arms are pivoted at their other ends to the jew 6 by means of it oin 21 connecting said opposite feces and is formed with.

rear end,

The block 15 is carried at one end oftwo indi- 1 of. these i the jaws, when they arefltlti formed with shoulders 28, extending outslot 22 in the jaw 6.

Jar portions 11 of the jaws project ears .25

. Fig. 3 of the drawings, after which they ends of the arms, and passing throu h. a

The inner face 0? the jaw 6 is formed with a stud 23 through which the slot is continued, the pin also passing there-through. The purpose or this stud is to space the arms sutliciently so that they may straddle the two jaws. The jaw 6 has a recess 24 through which the stud eX- tends when the two jaws are closed. From the outer surface of the semi-circuhaving perforations-26 to receive the rein links 2?. The lower portions of the ears, on opposite sides of the perforations 20, and at the lower portion of said perforations, are

'ardly and upwardly sutficiently to hold the links in an upright position, Thesesl1oulders also prevent the links from binding when they are being placed in a position for attachment on the hauling line, and they also make the links easily accessible, and not in teetering with other incidental operations pre niratory to the attachmentot the hauling line. The ends of the links which are connected to the ears 25 are smaller than their opposite ends, and the links, adjacent the first mentioned ends, are formed with a cross bar 29. Theears 25,- as well as the portions of the links which engage the same, are so shaped. as to allow a free movement of the links without the latter becoming locked, or out of position when the clamp is in operation.

The operation of the clamp will he apparent from the foregoing description, but may be summarized as follows: To apply the clamp to the casing or other cylindrical object, the jaws are swung open as shown in may be placed around the casing and closed, the casing being received between the semicircular portions 11 of the jaws. The arms are now swung upwardly, and the block 15 is placed in the recess, the latch bar 17 snapping into the groove 1%. The casing is now securely held in the clamp, and it is pulled, drawn or suspended by attaching a hauling shoulder.

line to the links 27. To release the casing,

the latch bar is disengaged from the groove, and the block is swung over the free ends of the jaws to extend beneath the jawed The block being new removed from the recess, the jaws may be swung open to release the casing.

The device herein described is simple and durable in construction, it can be readily applied to the object, and also removed there from, andit therefore effectually serves the purpose for which it is designed. What is claimed is l. A clamp of the character described comprising hinged jaws I having recessed edges, and said recesses forming a shoulder extending transversely ofv the jaws when the latter are closed and the shoulder being grooved, a pair of arms straddling the jaws, and pivotally connected to one of said jaws,

a block carried at the free ends ofthe arms,

and adapted to enter the aforesaid recesses, and a latch earned by the block, and engageable w th the aforesaid groove of the 9. A clamp of the character described comprising hinged jaws having recessed edges, said recesses forming a shoulder which extends transversely of the jaws when said jaws are in closed position, and said shoulder having a groove, a stud projecting from one of the jaws, the other jaw having a recess to receive the stud, said stud and that portion of the jaw from which it extends carrying a pivot pin extending transversely of the jaws, arms carried by said pin, said arms straddling the jaws when inclosed position a block carried by the'free ends or", th'ej arms, and adapted to enter the first mentioned recesses of the jaws, and a latch carti ed by the block, said latch being engageable with the groove of the aforesaid shoulder;

In testimony that I claim the foregoing as my own, 1 have hereto affixed my signature in the presence of two witnesses.

JOHN H. GIBSON. 

